[linux.git] / net / ieee802154 / netlink.c

/*
 * Netlink inteface for IEEE 802.15.4 stack
 *
 * Copyright 2007, 2008 Siemens AG
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2
 * as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Written by:
 * Sergey Lapin <[email protected]>
 * Dmitry Eremin-Solenikov <[email protected]>
 * Maxim Osipov <[email protected]>
 */

#include <linux/kernel.h>
#include <linux/gfp.h>
#include <net/genetlink.h>
#include <linux/nl802154.h>

#include "ieee802154.h"

static unsigned int ieee802154_seq_num;
static DEFINE_SPINLOCK(ieee802154_seq_lock);

struct genl_family nl802154_family = {
	.id		= GENL_ID_GENERATE,
	.hdrsize	= 0,
	.name		= IEEE802154_NL_NAME,
	.version	= 1,
	.maxattr	= IEEE802154_ATTR_MAX,
};

/* Requests to userspace */
struct sk_buff *ieee802154_nl_create(int flags, u8 req)
{
	void *hdr;
	struct sk_buff *msg = nlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC);
	unsigned long f;

	if (!msg)
		return NULL;

	spin_lock_irqsave(&ieee802154_seq_lock, f);
	hdr = genlmsg_put(msg, 0, ieee802154_seq_num++,
			&nl802154_family, flags, req);
	spin_unlock_irqrestore(&ieee802154_seq_lock, f);
	if (!hdr) {
		nlmsg_free(msg);
		return NULL;
	}

	return msg;
}

int ieee802154_nl_mcast(struct sk_buff *msg, unsigned int group)
{
	/* XXX: nlh is right at the start of msg */
	void *hdr = genlmsg_data(NLMSG_DATA(msg->data));

	if (genlmsg_end(msg, hdr) < 0)
		goto out;

	return genlmsg_multicast(msg, 0, group, GFP_ATOMIC);
out:
	nlmsg_free(msg);
	return -ENOBUFS;
}

struct sk_buff *ieee802154_nl_new_reply(struct genl_info *info,
		int flags, u8 req)
{
	void *hdr;
	struct sk_buff *msg = nlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC);

	if (!msg)
		return NULL;

	hdr = genlmsg_put_reply(msg, info,
			&nl802154_family, flags, req);
	if (!hdr) {
		nlmsg_free(msg);
		return NULL;
	}

	return msg;
}

int ieee802154_nl_reply(struct sk_buff *msg, struct genl_info *info)
{
	/* XXX: nlh is right at the start of msg */
	void *hdr = genlmsg_data(NLMSG_DATA(msg->data));

	if (genlmsg_end(msg, hdr) < 0)
		goto out;

	return genlmsg_reply(msg, info);
out:
	nlmsg_free(msg);
	return -ENOBUFS;
}

int __init ieee802154_nl_init(void)
{
	int rc;

	rc = genl_register_family(&nl802154_family);
	if (rc)
		goto fail;

	rc = nl802154_mac_register();
	if (rc)
		goto fail;

	rc = nl802154_phy_register();
	if (rc)
		goto fail;

	return 0;

fail:
	genl_unregister_family(&nl802154_family);
	return rc;
}

void __exit ieee802154_nl_exit(void)
{
	genl_unregister_family(&nl802154_family);
}
Commit	Line	Data
2c21d115 SL	1	/*
	2	* Netlink inteface for IEEE 802.15.4 stack
	3	*
	4	* Copyright 2007, 2008 Siemens AG
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License version 2
	8	* as published by the Free Software Foundation.
	9	*
	10	* This program is distributed in the hope that it will be useful,
	11	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	13	* GNU General Public License for more details.
	14	*
	15	* You should have received a copy of the GNU General Public License along
	16	* with this program; if not, write to the Free Software Foundation, Inc.,
	17	* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
	18	*
	19	* Written by:
	20	* Sergey Lapin <[email protected]>
	21	* Dmitry Eremin-Solenikov <[email protected]>
8e753dd0	22	* Maxim Osipov <[email protected]>
2c21d115 SL	23	*/
	24
	25	#include <linux/kernel.h>
5a0e3ad6	26	#include <linux/gfp.h>
2c21d115 SL	27	#include <net/genetlink.h>
2c21d115 SL	28	#include <linux/nl802154.h>
78fe738d DB	29
78fe738d DB	30	#include "ieee802154.h"
2c21d115 SL	31
2c21d115 SL	32	static unsigned int ieee802154_seq_num;
c4835d81	33	static DEFINE_SPINLOCK(ieee802154_seq_lock);
2c21d115	34
78fe738d	35	struct genl_family nl802154_family = {
2c21d115 SL	36	.id = GENL_ID_GENERATE,
	37	.hdrsize = 0,
	38	.name = IEEE802154_NL_NAME,
	39	.version = 1,
	40	.maxattr = IEEE802154_ATTR_MAX,
	41	};
	42
2c21d115	43	/* Requests to userspace */
78fe738d	44	struct sk_buff *ieee802154_nl_create(int flags, u8 req)
2c21d115 SL	45	{
	46	void *hdr;
	47	struct sk_buff *msg = nlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC);
c4835d81	48	unsigned long f;
2c21d115 SL	49
	50	if (!msg)
	51	return NULL;
	52
c4835d81	53	spin_lock_irqsave(&ieee802154_seq_lock, f);
2c21d115	54	hdr = genlmsg_put(msg, 0, ieee802154_seq_num++,
78fe738d	55	&nl802154_family, flags, req);
c4835d81	56	spin_unlock_irqrestore(&ieee802154_seq_lock, f);
2c21d115 SL	57	if (!hdr) {
	58	nlmsg_free(msg);
	59	return NULL;
	60	}
	61
	62	return msg;
	63	}
	64
78fe738d	65	int ieee802154_nl_mcast(struct sk_buff *msg, unsigned int group)
2c21d115 SL	66	{
	67	/* XXX: nlh is right at the start of msg */
	68	void *hdr = genlmsg_data(NLMSG_DATA(msg->data));
	69
8e753dd0	70	if (genlmsg_end(msg, hdr) < 0)
2c21d115 SL	71	goto out;
2c21d115 SL	72
78fe738d	73	return genlmsg_multicast(msg, 0, group, GFP_ATOMIC);
2c21d115 SL	74	out:
	75	nlmsg_free(msg);
	76	return -ENOBUFS;
	77	}
	78
339b4ca5 DB	79	struct sk_buff ieee802154_nl_new_reply(struct genl_info info,
	80	int flags, u8 req)
	81	{
	82	void *hdr;
	83	struct sk_buff *msg = nlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC);
	84
	85	if (!msg)
	86	return NULL;
	87
	88	hdr = genlmsg_put_reply(msg, info,
	89	&nl802154_family, flags, req);
	90	if (!hdr) {
	91	nlmsg_free(msg);
	92	return NULL;
	93	}
	94
	95	return msg;
	96	}
	97
	98	int ieee802154_nl_reply(struct sk_buff msg, struct genl_info info)
	99	{
	100	/* XXX: nlh is right at the start of msg */
	101	void *hdr = genlmsg_data(NLMSG_DATA(msg->data));
	102
	103	if (genlmsg_end(msg, hdr) < 0)
	104	goto out;
	105
	106	return genlmsg_reply(msg, info);
	107	out:
	108	nlmsg_free(msg);
	109	return -ENOBUFS;
	110	}
	111
cb6b3763	112	int __init ieee802154_nl_init(void)
2c21d115 SL	113	{
2c21d115 SL	114	int rc;
2c21d115	115
78fe738d	116	rc = genl_register_family(&nl802154_family);
2c21d115 SL	117	if (rc)
	118	goto fail;
	119
78fe738d	120	rc = nl802154_mac_register();
2c21d115 SL	121	if (rc)
	122	goto fail;
	123
1eaa9d03 DB	124	rc = nl802154_phy_register();
	125	if (rc)
	126	goto fail;
	127
2c21d115 SL	128	return 0;
	129
	130	fail:
78fe738d	131	genl_unregister_family(&nl802154_family);
2c21d115 SL	132	return rc;
2c21d115 SL	133	}
2c21d115	134
cb6b3763	135	void __exit ieee802154_nl_exit(void)
2c21d115	136	{
78fe738d	137	genl_unregister_family(&nl802154_family);
2c21d115	138	}
dfd06fe8	139